Tool-sharpener.



M. W. VBMNKNMNBI.

TOOL SHARPENER.

APPLICATION FILED NOV. 11, 1908.

Patented Aug. 9, 1910 4 SHEETS-SHEET 1 Si [Ue/14100 J J Z Z- :L

@witnesses M. W. BRINKMANN.

TOOL SHARPBNER,

APPLICATION FILED NOV. l1, 1903.

aented Aug. 9, 1910.

4 BHBETBf-SHBET 2.

M. W. BRINKMANN.

TOOL SHARPBNBE.

APPLIOATION FILED NOV.11. 1908. `965973, Patented Aug. 9, 1919.

4 SHEETS-SHEET 3.

@WW1/modes: l I nvaukoz M. W. BRINKMANN.

TOOL SHARPENER.

APPLICATION FILED NOV.11, 1908.

Patented Aug. 9, 1910.

4 SHEETS-SHEET 4.

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UNITED STATES 'PATENT GFFICE.

MORRIS W. BRINKMANN, OF NEW YORK, N. Y.

TOOL-SHARPEN ER.

To all whom it may concern: y y Be it known that I, MORRIS W. BRINK-MANN, a citizen of the United States, resid- .ing in the borough ofManhattan of the city of New York, in the State of New York, haveinvented certain new and useful Improvements in Tool-Sharpeners, ofwhich the following is a specification, reference being had to theaccompanying drawings,vform1ng a part hereof.

This invention relates to means for sharpening tools, particularly suchtools as twist. drills, With mathematical accuracy, and consists 1n thenew and novel features of construction and combination of partshereinafter set forth and claimed. p

In the accompanying drawings Figure 1 represents a plan viewof myimproved n rachine. I",ig.f2 represents an end elevation of the same.Fig. 3 represents a side elevation showin/g the standards and part ofthe bearings in sections. Fig. 4l is a detail view showing the bearingsfor the driving shaft and the rocking frame. Fig. 5 is a side elevationpartly in section of the tool holder. Fig. 6 is a detail View showing amodified means for centering the tool. Figs. 7 and 8 represent front andrear views respectively of the tool holder.

The tool 1 to be ground, for example a twist drill, is secured in aholder 2 supported by an arm 3 upon standards 4, fitted like the sliderest ofa lathe and provided with suitable graduations (i whereby theposition of the holder may be accurately and readily determined. Theholder is provided With a hollow head 7 whi :h forms a bearing for acarrier 8 rotatablyl mounted therein.

Said carrier is provided eccentric to its axis and to the axis of theholder with a bearing for a barrel or hollow spindle 9 to receive thetool to be ground. The rear end or butt 0f the tool seats ina edn/icalrecess provided in an aliner 10 moval'yle in the barrel; which centersthe rear end of' the tool. Said aliner may be fed forward by anysuitable means as by threads provided upon a shank 11 formed `integraltherewith and may be held in its adjusted position by a key 12 actuatedby any suit-able means, asthe beveled or pointed end of a small shaft 13mounted in the shank 11 and actuated by a handle 14. The point orcutting end of the tool 1 is held in a chuck 15'secured to the barrel 8and if a tool suchas a twist drill is to be ground, the point is furtherheld by oppo- Specication of Letters Patent.

Application filed November 11, 1908. Serial No. 462,041.

rasen-tea Aug. a, 191e.

engage behind the heel of the cutting lip. i aid fingers or extensionsarepreferably formed integral with levers 17 pivoted to lugs orextensions 18 secured to the chuck and having their reareuds providedwith rollers 19 that engage the beveled face of hardened'steel cone 20.Both the carrier and the barrel have flanges 21 and 22 respectivelysecured to or formed integral there- With, and any suitable means as thestops are provided for the purpose of holding the carrier and the barrelin their adjusted positions, and so as to determine the degree ofeccentricity employed. Suitable means either with or independently ofthe .ca-iier. A smaller wheel 25 is secured to a sleeve .26 threaded toengage with the shank upon the aliner and feed same forward into Contactwith the end of the drill.

The grinding device or tool 27, preferably an emery Wheel, is keyed uponan arbor 28 mounted in a frame 29, which is adapted to be rockedtransversely to the point of the tool to beground. The frame is providedwith a hollow7 trunnion 30 mounted in bear.- ings 31 provided in thestandards 4. Said bearings are formed in part by slip cones32 which areadjustable so that the bearing can be kept perfectly true. The trunnionsare hollow and, in turn, provide bearings` Jr'or the driving shaft-'33whichrotatcs the grinding device by any suitable means as belts 34. Theswinging or rocking movement is impartedfto the frame by a crank arm 35provided With an adjustable pin 36. The crank is seuredto a shaft 37mounted in a bearing 38 provided in the standards 4t and is actuatedfrom the main driving shaft by any suitable means as the belts 39. l

It' desired a liquid reservoir 40 is secured to the standards, fromwhich. a suitable liquid may be supplied to the grindingdeliquid afterbeing used is collected by a pan #hand is returned to the reservoir by apipe ft-i. Preferably the reservoir is provided with a narrow partitionLlli lengthwise thereot'. which separates and collects the. particlesot' metal or emery carried down to the reservoir by the returningliquid. The pump may be actuated by a pulley .-16 upon one end of themain driving shaft.

i sitely arranged fingers or extensions 16 thatI The operation of mymachine is as folas a hand wheel 24 is secured to the barrel .andprovides means for rotating the .same

vice by a pump 41 through pipes 42. A'The l emery ,wheel or vither 'Senanas lows: The drill ilto be sharpened lis placed' in thefbarrel or"spindle 9 and is carefully adjusted by means of the fingers 16 engagingthe same and thealiner 10 is then caused to engage the end of the dri-llso that it shall v If a twist drill.

be firmly held and centered. v is to befvround'the' barrel 'or spindle.9 is fixed. to ti'e carrier 8 by means 'of the stop 23 which is thengiven a slight to and fro movement which causesythe lip of the drill-tobe ground away. lWhen one lip has been 'properly ground the carrierand barrel are given ahalf turn which brings the-other lip of the drilladjacent to the grinding device and theoperatioii is repeated. lIn casea center punch or similar tool is to be ground the-carrier is'Aadjusted-so as toarrange the axis of the toolat the desired angle to therinder and the barrel orspindle is Arotated independently -of thecarrier. KSince jthe grinding device is given. a to and fro movementduringlthe grinding operation the wear 4will be evenly distributed oyerthe face of the wheel thus maintaining a true face, and 'consequently amuch more accurate cut can be obtained than is possible when the emerywheel is in fixed relation to the holder, vor when the wear of the wheeloccurs practically .in onefpath.

Although I have described -one form of mechanism embodying Amyinventionit is obvious that various changes within the skill `of themechanic may be made therein with- -out ,departing from the spirit oftheinvention provided the meansSet-Orth in the fol lowing claims beemployed.

.I' claim as my invention:

l. In a tool sharpenerlthe vcombination .'With' a holder for the tool tobe ground oom- -prising means for rotating said tool, of a' v grindingdevice and means to -move lsaid grindin ldevice transversely tothe axisof the tool during the grinding operation.

'2'. In a4 tool Sharpener the combination with a holder for the tool'tob'e ground oomprising means for rotating said tool, of a' 'Y grindingdevice andv meansv to rock said grinding device through a predeterminedar'ctransversely to 'the point of the tool during the grindingoperation.

` 3. In "a tool sharpener the Acombination with'a holder for'the tool tovbe ground and means to rotate said tool eccentrically to thel axis ofthe holder, of ad grindinggdgice, and

' trically to the axis of the holder, of a grind;V`

means to rock said grinding device duringYV the grinding operation. 1 4;In a tool Sharpener the vcombination with a holderA comprisingacarrierfor'the tool to be ground rotatably -mounted in the holder andmeans to rotatethe tool eccening device, means for rotating saidgrinding fdevic'e, and means orrocking said grinding device during-thegrinding operation.` In a tool Sharpener the combination 4tr-unnions foractuating said grinding tool.

7.In a tool Sharpener the combination withv supporting standards, of aframe movf ably mounted in bearings provided in said standards, agrinding toolon said frame, and adjustable means for imparting arocking1 moveineiitito said frame andgrinding too 8.`In va toolySharpener the combination with supporting standards, of a Jframe pro-l-vided with hollow -trunnions mounted in bearings provided in saidstandards, agrind-.-

ing tool on said frame, means for rocking saidframe, anda driving shaftmounted in said trunnioi'is concentrically therewith andV ope'lrativelyconnected with said grinding too. M

9. In a tool Sharpener the combination with supporting standards, of aframe movably mounted on said standards, a grinding .tool von saidtrame, al reservoircontaining liquid supported-onsaid standards,apui'npA for supplying the liquid to.'v said grinding tool, means forrocking said frame land means for operating said pump 'to' supply`liquid from the reservoir to the grinderi- 10. In a tool Sharpener thecombinationl with supporting standards, of a vframe mov- I ably mountedon said standards, means for rockin-g the frame, a grinding toolon saidframe, a gravity separating tank containing liquid supported on saidstandards, and a pump ttor supplying liquid fran said tanki .I

to the grinding tool.

11. In a tool-Sharpener the combination 'with a grinding device, ot aholder for -the tool'to be ground, said holder comprising a chuckprovidedwith fingers adapted to en- Agage opposite faces of -sai'd tooland hold V same in aliiiement against rotation in the holder,and movablemeans engaging the end,v

of the moi to center the same.

iis

12. In. a tool Sharpener the combination Y with a grinding device, of aholder for the` tool to be ground,'saidhold'er comprising a fingersadapted to seat against theedgeso said tool and hold samgagainstrotation, ant. movable means provided samer,A l

113. In a tool sharpener the combination` with a grinding device, of aholder for the tool'tob'e ground, said holder being `pro A. f

vided'with a conical recess-to receive the endof the tool, and means onthe-holderA `chuck provided. Yivitli oppositely arranged with a recessto.-

receive the end of the tool to center tha-'121sv eeegee to center thetool in said recess, and means -to hold same in its adjusted position.

14. Ina tool Sharpener the combination with a rocking frame and agrinding device mounted on said frame, of a holder for the tool to' be.ground, means on said holder to center the tool and hold same in itsadjusted position, means to rotate the tool during the grindingoperation, and means to feed said tool toward the grinder, substantiallyas described.

l5. In a tool Sharpener the combination with a rocking frame. a grindingdevioe mounted in said frame and means for rocking said frame, of aholder for the tool to 15 against movement relatively to said holder, 20

substantially as described.

This speifieation signed and witnessed this 29th day of October, A. D.1908.

MORRIS W. BRINKMANN.

Signed in the presence'of- THoMAs J. CANTY, MARGARET W. BEST.

